Re: Look-ahead arguments in for loops

[John Macdonald]

On Sat, Oct 01, 2005 at 02:22:01PM -0600, Luke Palmer wrote:
> And the more general form was:
> 
>     $sum = reduce { $^a + $^b } @items;
> 
> Yes, it is called reduce, because "foldl" is a miserable name.

So, the target of running a loop with both the current
and previous elements accessible could be written as either:

    reduce :identity undef
        { code using $^prev and $^cur ... ; $^cur }
        @items;

or:

    reduce :identity @items[0]
        { code using $^prev and $^cur ... ; $^cur }
        @items[1...];

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